Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9438275 | Transmission apparatus and transmission method | Yuya ISHIDA | 2016-09-06 |
| 9419709 | Transmission device and method for measuring delay | Tomoko Murakami, Toshihiro Suzuki, Shingo Hara | 2016-08-16 |
| RE44881 | Optical amplifier and an optical amplification method | Yoshihito Onoda | 2014-05-06 |
| 8331787 | Optical transmitting apparatus and optical multiplexing unit | Takeshi Noma, Haruki Tanaka, Yoshikazu Nakanishi, Makoto Ohtou, Ichiro Nakajima +1 more | 2012-12-11 |
| 8195052 | Optical wavelength multiplexing system, optical wavelength multiplexing method, and computer product | Makoto Ohtou, Akira Yamamoto, Tatsuo Nagayoshi, Katsumi Sugawa | 2012-06-05 |
| 8180219 | Providing signal reachability information to a network | Snigdho C. Bardalai, Abinder S. Dhillon, Sanjay Gera, Taichi Ueki, Vibha Chhatwal Sarin | 2012-05-15 |
| 7843631 | Gain control apparatus, optical transmission apparatus, gain control method for optical amplifier, and wavelength multiplex optical transmission system | Miki Onaka, Yasushi Sugaya, Etsuko Hayashi | 2010-11-30 |
| 7813642 | Optical transmission apparatus and method of controlling the same | Shinichirou Muro, Yasushi Sugaya, Etsuko Hayashi | 2010-10-12 |
| 7554720 | Optical transmission apparatus with automatic gain control and automatic level control mode selection | Yuki Murakami, Akira Yamamoto | 2009-06-30 |
| 7551857 | Optical transmission system | Tougo Fukushi, Akira Yamamoto, Masanori Kondoh | 2009-06-23 |
| 7466478 | Optical-level control method, optical-level control apparatus and wavelength-multiplexing optical network | Takuji Maeda, Haruki Tanaka, Hisayuki Ojima, Hiroaki Tomofuji, Koji Batou | 2008-12-16 |
| 7430372 | Optical transmission system | Mamoru Suematsu, Akira Yamamoto, Haruki Tanaka, Yuki Murakami, Hisayuki Ojima | 2008-09-30 |
| 7139120 | Optical amplifier with variable gain equalization | — | 2006-11-21 |
| 6373624 | Optical amplifier and an optical amplification method | Yoshihito Onoda | 2002-04-16 |
| 6304371 | Optical amplifier and an optical amplification method | Yoshihito Onoda | 2001-10-16 |
| 6118576 | Optical amplifier and an optical amplification method | Yoshihito Onoda | 2000-09-12 |
| 5912760 | Light amplifier | — | 1999-06-15 |
| 5859725 | Optical power monitor and optical amplifier having the optical power monitor | Yuji Tamura | 1999-01-12 |
| 5664131 | Light amplifier | — | 1997-09-02 |